Incandescent gas-burner.



K. KPPERS. y INGANDESGENT GAS BURNER.

Patented Apr. 20, 1909.

APPLIUATION FILED 00T.3, 1906.

T BEIGE.

KARL KPPERS, OF AACHEN, GERMANY.

INCANDESCENT GAS-BURNER.

Specification of Letters Patent.

Patented April 2o, 1909;

Application filed. October 3, 1906. Seri-a1 No. 337,290.

To all whom it mag/concern.'

Be it known that I, KARL Krrnns, asubject of the King of Frussia, GermanEmperor, and resident of 27-29 Stefanstrasse, Aachen, in the Province ofthe Rhine, German Empire, engineer, have invented newk air mixture forthe purpose of economically producing a flame of higher temperature.buch a burner is described in my prior U. S. Patent No. 802,297, datedOctober 17th, i905.

The object of the present invention is to effect a still greater economyin burners of this type and this greater economy is effected bypre-heating the gas of the ure gas flame. The arrangement used may a sobe adapted to effect a pre-heating of the mixture, so that the pure gasas well as the mixture of gas and air passes to the burner in a heatedstate. Burner constructions of this kind can be used for common uprightincandescent gas-lights as well as for those of the inverted type.

In order to make my invention better understood I accompany same bydrawings in which: i

Figure l represents a constructional form for pre-heating gas alone,showing the arrangement in a vertical section. Fig. 2 is a cross sectionon line A-B of Fig. 1. Fig. 3 a cross section on line C-D of Fig.' i andFig. 4 resembles a modified arrangement of the pre-heating device in avertical section, in which the mixtureiof gas and air is alsopre-heated. t

a is the inner tube through which gas flows coming from the gas conduitnot further shown in the drawing.

g is a body of insulating material to which the inner tube a and thetube c are attached, and which forms a chamber g.

d. is an outer tube closed at its upper end and surrounding the tube c.

e is a tapered part in connection with the lower end of the tube d andprovided with perforations e. v

e2 is an enlarged short tube forming the continuation of the taperedpart e and fitting into the chamber or recess g of the insulated body.The latter can be provided with projections or ribs of heat-conductingmaterial for increasing the reheating action of the arrangement. Furtermore the tube d can be provided with an enlargement and fitted with aninsulating mantle in its lower en h is an outer tube surrounding theinner tube a and the body g. At its lower end the tube h is connectedwith the inner tube a by the flange t having openings b throughwhich thegas can enter the annular space formed by the tubes aJ and h.

lc is a perforated body such for instance as a sieve which together withthe perforated part e forms the burner head. T e funnel- 'shapedperforated tube part f: of the burner head is attached at its lower endto the piece g and bears with its upper end against the tube h. v

Z is a covering or plate carried by the upper end of the outer tube hand rovided with openings or perforations n an with slots m. At thelower end or near it a number of holes i are cut into the tube h,through which fresh air enters from the outside and admixes with the gaswithin the tube h. This arrangement as foregoing described operates in.the following manner The gas flows partially through the openings b andenters partially the inner tube a. That gas, which passes the opening t,mixes in the annular space formed by the tubes a and h with air anddischarges at the top of the tube h through the openings and slots 'nand mrespectvely, after havingpassed the sieve ir. The part of the gasentering the vtube a flows upward through the tube c and then downwardthrough the annular space Vformed by the tubes c and d. In passingthrough the space the gas becomes intensely re-heated on account of theouter tube d eing surrounded by the lamp flame, which pre-heated gasfinally enters the chamber g and from there passes through a number ofsmall openings e in the tapered part e', where it admixes with the gasand air mixture, which immediately afterward rushes through holes 'n andslots m into the flame.

In the Fig. 4 a modified arrangement of the preheating device isillustrated. According to this figure the outer tube d is dispensed withand a tube a closed at its upper end, is provided within the chamber gwith openings or perforations b2. The tapered part e of the mantle e2 isattached to the tube a/ and provided with openings e. By means of thisarrangement the heat is conducted from the upper part of the tube a toits lower portions and in this Way the loWei1 poition of the tube e ispie-heated by the time it passes through the openings Z22. The mixturesoi gas and aii1 which lave around the hot Wells of the lower portions oftube a will in this construction be also preheated to ai ceitein extentbefore it reaches the burner heed.

Having thus fully described the nature ol' Lettei's Patent oi the UnitedSta-tes iszl, In sin incandescent burner, a burner heed, e ges supplypipe, e conduit eonnnunieating diectly With the atmosphere and with thesupply pipe and leading to seid buinei head, e second conduit Closed tothe ethicspheie leading fiom the ges supply pipe to the burner head andineens for heating portions of said second conduit.

2. In an incandescent burner, a huinei head, t ges supply pipe, econduit coniniunieating directly With the atmosphere end with the supplypipe end leading to seid burner i I 4 l I l f i l I niy seid invention,what l desire to seeui'e by j 1 l r I l gas passing through this hezid,a second conduit closed to the atmosphere leading l'ioni the gas supplypipe to the l burner head :ind said conduits.

3. fin incandescent gas burnei` hzivinpr :i binnei tube with peil'ointions opening` to the atmosphere, i gais supply pipe lending to smidbuinei' tube, :t eoneeni'niiczilly within the buinei1 tube and leadingfioin seid gas supply pipe and l'oipsit oi" its length within the llame,u buinei head comprising :i peiloi'aited tuie ol gais und :iii passesund e pei'l'oiuted outlet plate thiough which the puie fue 'ioni saidconeentiioelly iiiiunged pipe passes, substantially iis desci'ibed undl'oi' the purpose set i'oth.

ln Witness whei'eolA l. have hereunto set my hand in the presence ol"two Witnesses.

ineens l'oi' heating both ol' llvitnesses: H

HENRY liiisenu, WOLDEMAR lfliiUP'i.

pluto, through `which the niifrft.:

